Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

e2e/cypress/tests/plugins/shell.js

@@ -0,0 +1,30 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+const extractZip = require('extract-zip');
+const shell = require('shelljs');
+
+const shellFind = ({path, pattern}) => {
+    return shell.find(path).filter((file) => {
+        return file.match(pattern);
+    });
+};
+
+const shellRm = ({option, file}) => {
+    return shell.rm(option, file);
+};
+
+const shellUnzip = async ({source, target}) => {
+    try {
+        await extractZip(source, {dir: target});
+        return null;
+    } catch (err) {
+        return err;
+    }
+};
+
+module.exports = {
+    shellFind,
+    shellRm,
+    shellUnzip,
+};